[lmi] trivial MSVC warning fix in loads.hpp

[Vadim Zeitlin]

 Hello,

 Putting aside the errors in yare_input.cpp and several other files where
the same problem (inability to deduce the template arguments) occurs, there
is only one new warning in the MSVC build about load_details which is
forward declared as a class and then defined as a struct. I think it's more
appropriate to keep it as a struct so I'd like to commit the following
change:

--- loads.hpp   2008-07-14 17:19:26 +0000
+++ loads.hpp   2008-08-02 00:03:15 +0000
@@ -32,7 +32,7 @@

 class BasicValues;
 class TDatabase;
-class load_details;
+struct load_details;

 /// Declaration of class Loads.


 Would you have any objections to this?

 Thanks,
VZ